Microsoft's news center has accidentally announced two new Windows phone devices, Lumia 640 and Lumia 640 XL one day before the official announcement which is to take place at a press event at Mobile World Congress.
According to the Verge, Microsoft will most likely launch two new low-end devices, as the numbering scheme suggests.
The Lumia 640 XL is presumably a bigger version of the Lumia 640.
Leaked information about the devices suggests that the Lumia 640 will be a 5-inch device with 1GB of RAM and 8GB of storage, all powered by Qualcomm's Snapdragon 400 processor.
Rumours also suggest that Microsoft is placing an 8-megapixel camera at the rear of the device and a 1-megapixel camera at the front.